Eng-Tips is the largest forum for Engineering Professionals on the Internet.

Members share and learn making Eng-Tips Forums the best source of engineering information on the Internet!

  • Congratulations JStephen on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: PKJENNY
  • Content: Threads
  • Order by date
  1. PKJENNY

    UPS Load Test

    Hi, Could I some advices about UPS load test (burn-in test)? Is it common to do the burn-in test with reactive load, with both leading and lagging power factor load, given the UPS is specified to e.g. 0.8 leading and lagging power factor without de-rating? I just wonder if all the UPS...
  2. PKJENNY

    HV Power transformer connection type

    Hi, Want to get some advices on HV transformer connection type. I see two different transformer connections in 2 different projects which are just nearby. One is having a YY transformer (110kV), another one has a DY transformer (66kV). I'm not sure why the design is such different given a...
  3. PKJENNY

    Seismic Structural Design

    Hi, Following the recent earthquake happened in Myanmar, a question comes to mind about seismic design. Thailand is not considered as a seismic region. However, the Myanmar earthquake extends to Thailand, even to Bangkok which seems to be very far away from Myanmar, causing severe damage there...
  4. PKJENNY

    Fault Analysis at ATS

    Do I need to do any fault scenario analysis of two power sources short circuit at the ATS?
  5. PKJENNY

    Discrimination between breakers

    When I do a fault discrimination analysis, if I have a final circuit of 32A 1ph MCB with an immediate 400A 3ph upstream MCCB, do I still need to detail check the discrimination, or, from the ratings of the upstream and downstream breakers I can already told discrimination is achieved?
  6. PKJENNY

    Discrimination Under Earth Fault

    Hi, I have a query regarding an installation where there is an upstream 400A MCCB supplying several 1ph 32A type D MCBs. According to the manual of the 400A MCCB, the ground fault current setting is set at 80A with 0.2s tripping time. However, at 80A, the 32A MCB downstream only trip as...

Part and Inventory Search

Back
Top